Poly Tuner

Guitar, Bass, Ukulele, Banjo & Mandolin

Chromatic Mode

432 Hz

Click "Start Microphone" to enable automatic tuning detection

About Poly Tuner

Poly Tuner is a free online instrument tuner that supports guitar, bass, ukulele, banjo, and mandolin. It features standard tunings, alternate tunings like 1/2 step down, full step down, and 1 1/2 step down, as well as open tunings. The tuner offers both reference tones and microphone pitch detection for accurate tuning.

How to Use

Select your instrument and preferred tuning
Click "Start Microphone" to enable pitch detection
Play a string on your instrument
The tuner will show if the string is flat, in tune, or sharp
Adjust your string until the center green LED lights up

This was created after endless frustration searching for a guitar tuner that was easy to use with an insturment in your hand. Find this tuner useful? Help support it. It is developed and maintained by your contributions.

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Contact Us

Have questions or feedback? Have an idea for a feature? Click the "Contact" link at the top of the page and send us a message. We will get back to you as soon as possible.